Basic Guide to Design and Implementation of Secure Digital Card

Basic Guide to Design and Implementation of Secure Digital Card

Most of the secure digital card products sold in the market offer 2GB in maximum capacity, along with other standard capacity cards. However, there are some new models that were released and is capable of holding up to 4GB in memory. For SDHC memory cards, most can even offer up to 32GB in memory space and capacity. However, the introduction of 4GB secure digital card into the market has resulted in compatibility confusion since each type of card offer unique communication protocol.

The host device would not often recognize the difference between each type of card because they appear the same. The SDHC family consists of the following cards: miniSDHC, miniSD, microsSD, and of course SD or secure digital card. Meanwhile, there is also the special SDIO family that includes SDIO and miniSDIO. Smaller secure digital card use adapters in other to perform physical conversion in order for it to fit and be read into a larger card slot.

The communication protocol for secure digital card family often differs from those that are used for other families of card such as SDXC, SDIO, and SDHC. Hence, older host devices might have trouble recognizing or would not recognize these cards at all. But you need not worry since it won't cause physical or electrical damage to both the secure digital card and the host device.

A secure digital card utilizes the MMC or MultiMediaCard format although there are slight differences with this format. The card features an asymmetrical shape to ensure that you won't be inserting it upside down. Meanwhile, a MultiMediaCard can be inserted in an inverted position although it won't be recognized or read. Secure digital card is thicker than a MultiMediaCard, which does not have a write-protect switch. There are smaller versions of the SD card sold in the market, though such as microSD and miniSD.

Both the secure digital card and MMCs have the electrical contacts placed underneath the card's surface to protect it against physical contact, especially when it is touched by the user's fingers. Thus, it helps in the preservation of the card and keep it from getting damaged. All secure digital card types have an average transfer rate of about 80 to 160 megabytes, but there has been recent improvements done on this technology such that users can expect improved capacity.

Majority of devices nowadays are equipped with slots for secure digital card. But in case the card won't fit into the slot, you can use a number of devices that would be compatible with both the card and the slot. These include card readers, active electronic adapter, or USB connectors, whichever is available.

POST COMMENT

Benefits of Owning an Electric Cooktop Gas, Induction and Electric Cooktops Attend Centennial College's Digital Animation Program and Get Creative How to buy Electric Cooktops How to Find Information on Buying an Electric Range Maintenance Tips for an Electric Range Make Cooking Easy with an Electric Range Not Your Granny's Electric Range The Ease of an Electric Range Different Types of Industrial Ink Jet Printers What Do You Want To Know On Electrical Muscle Stimulation Machine? Electric Fly Swatter - Is This Gadget Fairly Handy And Much More Efficient Than The Old Fashioned Manual One? Variations of Industrial Mixers